Compress images online
Reduce the file size of JPG, PNG and WebP images without visibly losing quality. Compression runs entirely in your browser, so your photos are never uploaded anywhere.
100% private: files are processed in your browser and never uploaded to any server.
How it works
- Drop one or more images into the box above, or click to choose files.
- Pick a quality level, or type an exact target size in KB.
- Download each compressed image — the size saving is shown next to every file.
Frequently asked questions
Does compressing an image reduce its quality?
Lossy compression removes detail the eye barely notices. At the default setting the difference is invisible for most photos; if you need a smaller file you can lower the quality or set a target size and let the tool find the best balance.
Are my images uploaded to a server?
No. Imgnest compresses images with code that runs inside your browser. Your files never leave your device — you can even disconnect from the internet after the page loads and the tool keeps working.
Is there a limit on file size or number of images?
No. Because processing happens on your device, there are no queues, no daily limits and no maximum file size beyond what your browser can handle.
Which formats can I compress?
JPG/JPEG, PNG and WebP. If you need to shrink an iPhone photo, use the HEIC to JPG converter first, then compress the result.